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57 lines
2.1 KiB
C++
57 lines
2.1 KiB
C++
// Jolt Physics Library (https://github.com/jrouwe/JoltPhysics)
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// SPDX-FileCopyrightText: 2021 Jorrit Rouwe
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// SPDX-License-Identifier: MIT
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JPH_NAMESPACE_BEGIN
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void JobSystem::Job::AddDependency(int inCount)
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{
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JPH_IF_ENABLE_ASSERTS(uint32 old_value =) mNumDependencies.fetch_add(inCount, memory_order_relaxed);
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JPH_ASSERT(old_value > 0 && old_value != cExecutingState && old_value != cDoneState, "Job is queued, running or done, it is not allowed to add a dependency to a running job");
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}
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bool JobSystem::Job::RemoveDependency(int inCount)
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{
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uint32 old_value = mNumDependencies.fetch_sub(inCount, memory_order_release);
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JPH_ASSERT(old_value != cExecutingState && old_value != cDoneState, "Job is running or done, it is not allowed to add a dependency to a running job");
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uint32 new_value = old_value - inCount;
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JPH_ASSERT(old_value > new_value, "Test wrap around, this is a logic error");
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return new_value == 0;
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}
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void JobSystem::Job::RemoveDependencyAndQueue(int inCount)
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{
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if (RemoveDependency(inCount))
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mJobSystem->QueueJob(this);
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}
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void JobSystem::JobHandle::sRemoveDependencies(const JobHandle *inHandles, uint inNumHandles, int inCount)
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{
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JPH_PROFILE_FUNCTION();
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JPH_ASSERT(inNumHandles > 0);
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// Get the job system, all jobs should be part of the same job system
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JobSystem *job_system = inHandles->GetPtr()->GetJobSystem();
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// Allocate a buffer to store the jobs that need to be queued
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Job **jobs_to_queue = (Job **)JPH_STACK_ALLOC(inNumHandles * sizeof(Job *));
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Job **next_job = jobs_to_queue;
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// Remove the dependencies on all jobs
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for (const JobHandle *handle = inHandles, *handle_end = inHandles + inNumHandles; handle < handle_end; ++handle)
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{
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Job *job = handle->GetPtr();
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JPH_ASSERT(job->GetJobSystem() == job_system); // All jobs should belong to the same job system
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if (job->RemoveDependency(inCount))
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*(next_job++) = job;
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}
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// If any jobs need to be scheduled, schedule them as a batch
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uint num_jobs_to_queue = uint(next_job - jobs_to_queue);
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if (num_jobs_to_queue != 0)
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job_system->QueueJobs(jobs_to_queue, num_jobs_to_queue);
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}
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JPH_NAMESPACE_END
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